Yesterday, I asked Roosevelt Island Operating Corp (RIOC) President Shelton
Haynes: 

There is no Roosevelt Island F Train Service to Manhattan Friday – Saturday
Night and no Roosevelt Island F Train Service from Manhattan Saturday Night
to Monday Morning. See attached photo.

With only 1 Tram cabin in service and weekend visitors expected, does RIOC
have any plans to address this situation?

Will RIOC run a Manhattan Red Bus Shuttle this weekend?

Does the MTA have any plans to increase bus service this weekend?

Does RIOC have any comment on the transportation situation this weekend to
the community?

No reply from RIOC.

According to the MTA there is
no Roosevelt Island F Train service
to Manhattan from Friday 9:45 PM to Saturday 10 PM

and
no Roosevelt Island F Train service
from Manhattan Saturday 11:45 PM to Monday 5 AM.

Be prepared for long lines at the Tram.